ocfs2: handle a symlink read error correctly

ocfs2: handle a symlink read error correctly

commit 2b4c2094da6d84e69b843dd3317902e977bf64bd upstream.

Patch series "Convert ocfs2 to use folios".

Mark did a conversion of ocfs2 to use folios and sent it to me as a
giant patch for review ;-)

So I've redone it as individual patches, and credited Mark for the patches
where his code is substantially the same.  It's not a bad way to do it;
his patch had some bugs and my patches had some bugs.  Hopefully all our
bugs were different from each other.  And hopefully Mark likes all the
changes I made to his code!

This patch (of 23):

If we can't read the buffer, be sure to unlock the page before returning.

Link: https://lkml.kernel.org/r/20241205171653.3179945-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20241205171653.3179945-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Mark Tinguely <mark.tinguely@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>